Slide Presentation dated November 15, 2010

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EMC to Acquire Isilon

Joe Tucci

Chairman & CEO, EMC Corporation

Pat Gelsinger

President & COO, EMC Corporation

Sujal Patel

President & CEO, Isilon

David Goulden

EVP & CFO, EMC Corporation

Exhibit 99.1

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Important Information

This presentation (this "Statement") relates to a planned tender offer by Electron Merger Corporation ("Purchaser"), a

wholly owned subsidiary of EMC Corporation ("EMC"), for all shares of outstanding common stock of Isilon Systems, Inc.

("Isilon"), to be commenced pursuant to an Agreement and Plan of Merger, dated as of November 14, 2010, by and

among EMC, the Purchaser and Isilon.

The tender offer referred to in this Statement has not yet commenced. This Statement is neither an offer to purchase nor a

solicitation of an offer to sell any shares of Isilon. The solicitation and the offer to buy shares of Isilon common stock will

be made pursuant to an offer to purchase and related materials that EMC and Purchaser intend to file with the U.S.

Securities and Exchange Commission (the “SEC”). At the time the tender offer is commenced, EMC and Purchaser intend

to file a Tender Offer Statement on Schedule TO containing an offer to purchase, forms of letters of transmittal and other

documents relating to the tender offer and Isilon intends to file a Solicitation/Recommendation Statement on Schedule

14D-9 with respect to the tender offer. EMC, Purchaser and Isilon intend to mail these documents to the stockholders of

Isilon. These documents will contain important information about the tender offer and stockholders of Isilon are urged to

read them carefully when they become available. Investors and stockholders of Isilon will be able to obtain a free copy of

these documents (when they become available) and other documents filed by EMC, Purchaser and Isilon with the SEC at

the website maintained by the SEC at www.sec.gov. In addition, the tender offer statement and related materials may be

obtained for free (when they become available) by directing such requests to EMC Corporation at Attention: Office of the

General Counsel, 176 South Street, Hopkinton, MA 01748. Investors and stockholders of Isilon may obtain a free copy of

the solicitation/recommendation statement and other documents (when they become available) from Isilon by directing

requests to Isilon Systems, Inc. at Attention: Investor Relations Department, 3101 Western Avenue Seattle, Washington

98121.

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Forward-Looking Statements

This presentation contains “forward-looking statements” as defined under the Federal Securities Laws. Actual results

could differ materially from those projected in the forward-looking statements as a result of certain risk factors, including

but not limited to: (i) adverse changes in general economic or market conditions; (ii) delays or reductions in information

technology spending; (iii) our ability to protect our proprietary technology; (iv) risks associated with managing the growth

of our business, including risks associated with acquisitions and investments and the challenges and costs of integration,

restructuring and achieving anticipated synergies; (v) fluctuations in VMware, Inc.’s operating results and risks associated

with trading of VMware stock; (vi) competitive factors, including but not limited to pricing pressures and new product

introductions; (vii) the relative and varying rates of product price and component cost declines and the volume and mixtur

of product and services revenues; (viii) component and product quality and availability; (ix) the transition to new products,

the uncertainty of customer acceptance of new product offerings and rapid technological and market change; (x)

insufficient, excess or obsolete inventory; (xi) war or acts of terrorism; (xii) the ability to attract and retain highly qualified

employees; (xiii) fluctuating currency exchange rates; and (xiv) other one-time events and other important factors

disclosed previously and from time to time in EMC’s filings with the U.S. Securities and Exchange Commission. EMC

disclaims any obligation to update any such forward-looking statements after the date of this presentation.

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Joe Tucci

Chairman & CEO

EMC Corporation

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EMC Signs Definitive Agreement

To Acquire Isilon

•

EMC To Acquire All Outstanding Shares For $33.85 / Share

•

29% Premium To Friday’s Closing Price, 18% Premium To Closing Price On

Day Of Isilon’s

Q3 Earnings Call

(10/21)

•

Total Enterprise Value Of ~$2.25 Billion

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Pat Gelsinger

President & COO

EMC Corporation

The “

Big Data”

Opportunity

•

Data Volumes Are Expected To Grow 44x By 2020

–

Growth In Unstructured Data Will Be 3x Structured Data

•

New Requirements For Managing Big Unstructured Data

–

Scale-Out NAS Storage (Isilon)

–

Object Storage (Atmos)

•

$2B Opportunity Going To

$6B By 2014 (36.7% CAGR)

•

Storage Infrastructure For

Private / Public Clouds

Scale-Out NAS ($B)

$0.5

$1.18

$1.69

$2.51

$3.65

$4.69

$5.35

$6.12

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Isilon

Is Very Complementary To EMC

Enterprise Applications

“Big Data”

Applications

Geophysical

Exploration

Media Editing

& Rendering

Gene

Sequencing

ERP

Document

Mgmt

SAN & NAS (VMAX, Unified)

Scale Out NAS (Isilon)

Object Storage (Atmos)

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EMC : A Complete Solution For Big Data

EMC Atmos

Object Storage

(SOAP, REST)

Performance

Single Location

Isilon

Scale Out NAS

(CIFS, NFS)

Globally Distributed

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The EMC Big Picture

Information

Protection & Security (Data Domain, Avamar, RSA)

Enterprise Applications

“Big Data”

Applications

Geophysical

Exploration

Media Editing

& Rendering

Gene

Sequencing

ERP

Document

Mgmt

SAN & NAS (VMAX, Unified)

Analytics

(Greenplum)

Scale Out NAS (Isilon)

Object Storage (Atmos)

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Sujal

Patel

President & CEO

Isilon

Systems

•

Founded In 2001; Headquartered in Seattle, WA

•

Seasoned Management Team; 500 Employees

•

Leading Provider Of Scale-Out

NAS

Storage Solutions

•

2010 Revenues Forecast At ~$200 Million

•

77% YOY Growth, 1500 Customers

About Isilon

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Isilon

Use Case: Kodak

Scale-Out NAS For The World’s Leading Online Photo Website

•

Challenge

–

25 Million Users, 2BN Images

–

Reduce capital & operating costs

–

Deliver unsurpassed reliability

–

Add multiple TB/day

•

Solution: Isilon

–

Scaled from 10 TB to 10 PB w/o adding

any IT staff

–

More than $600K/yr in operating

savings

–

Eliminated 360 different file systems

–

Major reduction in capital costs

“With our legacy systems we

had more than 360 separate

network volumes and with

Isilon

we’ve increased

capacity by 20X with only a

handful of volumes to

manage.”

Sonja Erickson

VP, Technical Operations

Kodak Gallery

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Isilon

Use Case: Sony

Scale-Out NAS For World Leader in Entertainment

•

Challenge

–

VFX, Blu-Ray and online music

–

Time-to-market critical

–

Monetize new and existing content

–

High performance and scalability a must

•

Solution: Isilon

–

Core underpinning of Sony’s IT

infrastructure

–

Unified disparate content silos to

accelerate new content creation

–

Sped time-to-market across multiple

business sectors

–

Hundreds of TBs

requires less than one

FTE

“With Isilon, we can

eliminate tedious, manual

data migration tasks and

better utilize our existing

storage, while also freeing

valuable human resources

for higher-order priorities.

The cost-savings potential is

significant.”

Nick Bali

Engineer

Sony Imageworks

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Isilon

Use Case: Broad Institute

Scale-Out NAS For World Leader in Genomic Research

•

Challenge

–

Multiple TB/day data growth

–

Limited IT Staff

–

High capacity and performance needs

•

Solution: Isilon

–

Sustained more than five-fold increase

in data w/o adding any IT staff

–

On-demand scaling minimizes capital

costs

–

Single file system and point of

management minimizes operating

costs

–

Multi-path I/O performance ideal for

accelerating sequencer analysis

“With Isilon, we’ve been able

to grow a single file system

to over three petabytes,

while still maintaining the

data throughput necessary

to power our workflow and

advance our research.”

Matthew Trunnell

Manager of Research Computing

The Broad Institute

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Benefits For Isilon

•

EMC Vision & Strategy

–

Isilon

Product Line Is Now An Integral Part Of EMC’s Vision For Private

/ Public Cloud Computing

•

EMC Products & Technology

–

Best Of Breed Portfolio

–

Relevant To The Future Of The Data Center & IT

•

Scale

–

Leverage EMC Sales Team, Partner Network, Customer Base, Service

Capability, to Accomplish Goals

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Pat Gelsinger

President & COO

EMC Corporation

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Summary

Apply The “EMC Effect”

To Isilon

•

History Of Successful Integration And Growth

–

VMware, Data Domain, Avamar

•

Big Market Opportunity

–

“Big Data”

: Unstructured Data Growing 3x Structured Data

–

$2BN Opportunity Growing To $6BN By 2014, 36.7% CAGR

•

Leading

Product

Portfolio

For

Managing

“Big

Data”

–

Isilon

: Scale Out NAS, Atmos

: Object Storage

•

Revenue Acceleration

–

~12,000 Go-To-Market Personnel vs. ~120 For Isilon

–

Scale

Out

NAS

Object

Billion

Run

Rate

During

2012

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David Goulden

EVP & CFO

EMC Corporation

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EMC Signs Definitive Agreement

To Acquire Isilon

•

EMC To Acquire All Outstanding Shares For $33.85 / Share

•

29% Premium To Friday’s Closing Price, 18% Premium To Closing Price

On Day Of Isilon’s

Q3 Earnings Call

(10/21)

•

Total Enterprise Value Of ~$2.25 Billion

•

No Impact To EMC GAAP And Non-GAAP Earnings In 2010

•

Accretive To Non-GAAP Earnings In 2011

•

$1 Billion Run Rate Revenue From Isilon

And

Atmos

During 2H 2012

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Questions